Railway car truck



G. E. DATH 2,386,384

RAILWAY CAR TRUCK Filed May 19, 1944 Gewyez'. Hath jar/621 221" Patented Oct. 9, 1945 RAILWAY CAR- TRUCK George E. Dath,.Mokena, Ill.,'assig"nor to :H. Miner, Inc., Chicago, III.-, a corporation of Delaware Thiszinventionrelates to improvements inrailway cartrucks. I Y :One. object of the invention is to provide simpleand efficient friction means fr"SIlubbiHg:Or dampening the action of the. usualtruck springs of 'a railway car, thereby reducing the oscillations and vibrations of the same to such anextent that the'car and its lading are protected against damage. a

Another objeotof the. invention is to provide a snubbing means comprising rockable friction members movable with the truck bolster of a railway-car truck and having sliding frictional engagement with the bolster. :guides of .thetruck side frame, wherein. springnimeansis employed,

mounted ontheside frame for pressing the rocking friction members against the bolster guides, the spring. meansbeing arranged to also add-to the load carrying capacity of thetruck springs.

Other objects of the invention will more clearly appear from the description and claimsihereinafter following.

In the drawing forming a part of this specification, Figure lis a side elevational view-"eta portion of a railwaycar. truck, illustrating my improvements in connection therewith, certain parts of the side frame and the truck bolster being shown in'vertical section. Figure 2 is av horizontal sectional view, corresponding substantially to the line 2--2 of Figure 1. Figure 3 is: a' detailed, perspective view of one of the rockingrfriction members of my improved snubbing means;

i In said drawing, Ill indicates one of the: side fiame members of a railway car truck; Thesside rame' H), as shown, is in theform of a casting and has top and bottom'members H; and i2 con.- nected by spaced vertical sections l 3l 3 forming guides for the truck bolster. As will be understood by those skilled in this art, the truck includes two side frame members |u |o, a truck bolster IA, and truck springs IL -l5. The bolster M has its opposite ends guided between the vertical sections l3-I3 of the truck side frames lib-ID and is supported by the springs l5-l5. As most clearly shown in Figure 1, the sections i3-I3 are inwardly offset at their upper end portions to provide guides Iii-l5, which cooperate with guide seats l'll'! at the sides of the bolster I4. The truck springs l5l5 are supported directly on the bottom members lZ-IZ of the side r frames l0-I U, the usual top and bottom spring follower plates I 8 and I9 being interposed between each truck spring cluster and the truck bolster and the bottom member of the side frame.

As illustrated in the drawing, my improved ApplicationMay 19, 1944-, Serial N0.-.536,32t;

solai (01. -197.)

snubbing means includes broadly a pair of rock ing friction members oneness A-f-A at each end" of'the truck bolster, and a coil springBcooperat ingwith each'rockingr friction memberl j;

In'carrying out .my invention, I provide e'akzh of the vertical sections l3"l3:'of the truck side frame withlaterally' spaced, vertically extending; parallel ribs 2-02 lifwhi'ch project front the ver tical inner wall 2! of the section I3-at opposite side edges of said wall, and together-form the corresponding inwardlyofiset guide i6 which engages in the'seat IT at the"correspondingsidebf the bolster l4. At oppositesid es of the bol's'ter'l-d. fulcrum pockets o'r seats 2 2-22 are provided" for the rockingfri'ction members A-A, the seats H -22- being in transverse alignment andformed byinwardly offsetting the vertical sidewalls'of the truck bolster. The seats 22 22 are located near the upperportion'i of the bolster 1 Hist-the centers of the guideseats thereof." l

'The rocking friction members orshoes 'A are four in number for each truck of the railwaycar, the same'being arranged in pairs" at opposite ends of thetruck'bolsten'the J members of eachpair being at oppdsite sides of's'ai d bolster. Each rocking'cfriction member A comprises a fiat rec'- tangular'piate" member 23,9. fulcrum arm. 24 projecting from'the' inner side of the plate 23 at the upper end thereof, and aspring fdllower'arm '25 proiectingfromthe outer side of theplate at the upper endof the same. The arms 24' and 25 extend at right anglestozth plate. andthe' outer end of the arm' 211s roundedoffgas' iridicatm at 26. The' arm 25 hasa'disclike follower plate'portion '21- at the outer endthereof, which 'isfconnected'to the plate. 23' by'anarrow shank 28.

- As hereinbe'foi'e stated,'*the "frititibn'members A-A are disposed at opposite sides of the bolster. The plate 23 of each friction member A is interposed between the side of the bolster and the wall 2| of the corresponding vertical section S3 of the side frame. The arm 24 of the plate 23 is engaged in the corresponding fulcrum seat 22 of the bolster and has its rounded end 26 seated against the inner end wall of the seat 22, which wall is also rounded to properly cooperate with the end of the arm. The arm 25 of the plate 23 extends through the wall 2| of the section l3 of the truck side frame, said wall being vertically slotted, as indicated at 29, to accommodate the shank 28 of said arm for vertical sliding movement and slight rocking action.

The springs B are four in number for each truck, one spring B being associated with each rocking friction member A. The spring B of pended hereto.

each rocking friction member is interposed between the follower disc portion 21 of the arm 25 of said member and a horizontally disposed web 30 on the corresponding, side of the truck side frame connecting the side walls of said side frame. The spring B is under initial compression and tends to rock the shoe Aoutwardly away from the side of the,,bolster against the. Wall 2| of the sideframe; A spring follower'plate 3| is preferably interposed between the bottom end of the spring B and the web 30. v lower plate 3| and the disclike follower portion 21 of the arm 25 are provided with centeringpro' jections 32-32 which engage in the upper, and

lower ends of the spring B to holdthe same prop- 5,,

erly centered.

In order to facilitate assembling ofthe rocking the vertical sections 13 thereof, as indicated at 3-333. The fulcrum arms of the rocking-friction members are first placed in the sockets or pockets of the bolster, and the bolsteig'with'the rocking friction members assembled'therewith; is then slit into position between the guides Iii-I6 and Iii-46 of the truck sidel frame, the spring follower arms 25 of the rocking'fricti'on members passing through the slots 33'33 in the side framewalls.

The operation of my'improved snubbing'mea'ns is as follows: Upon relative vertical movement of the bolster M with respect to the side frame H), the coils of the truck spring cluster are compressed between the bolster and'the bottom member l2 of the truck side frame. Atthe same time the friction members A-A are forced to'slide vertically along the bolster guides,- moving substantially in unison with the bolster M." This movement of the friction members is resisted'by the springs BB which also tend to rock the friction members to force the friction plate portions thereof tightly against the bolster guides. A friction snubbing action is thus produced during compression of the springs. .As will be evident, the capacity of thesprings BB is added to the capacity of the usual truck springs," thereby substantially increasing the carrying capacity'of the spring means. During recoil of the truck springs, the friction elements A-A move upwardly with the bolster and, clue to the frictional engagement r thereof with the guides on the truck side frame, also dampen the recoil actionx I have herein shown and described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims ap- The spring fol I claim:

1. In a railway car truck including a truck side frame having spaced bolster guides, the combination with a vertically movable bolster; of a cluster of truck springs supporting said bolster on the side frame; rocking friction members movable with the bolster, each of said friction membersthaving alaterally extending. fulcrum arm at one side thereof and a laterally extending spring abutment arm at the other side, said friction members being interposed between the bolster'and the bolster guides and slidably engaging said guides, the fulcrum arm of each member being fulcrumed on the corresponding side of the bolster; and spring means buttressed against the side frame, said spring means engaging the spring abutment arms for pressing the friction members against the bolster guides.

2. In a railway car truck including a truck side frame having spaced bolster guides, the combination with a vertically movable bolster; of a cluster of truck springs supporting said bolster on'the side frame; rocking friction members at opposite sides of the bolster, each friction member' including a friction plate having laterally projecting arms at opposite sides thereof, said plate being interposed between one side of the bolster and the corresponding bolster guide and having one of its arms fulcrumed on the bolster and the other arm of said plate extendingthrough the bolster guide; a spring abutmenton the side frame below said last named arm; and a spring bearing at opposite ends on the spring abutment and said last named arm.

3. ma railway car truck including a truck side frame having spaced bolster guides, the combination with a vertically movable bolster having fulcrum pockets at opposite sides thereof; of a cluster oftruck springs supporting said bolster on the side frame; rocking friction members at opposite sides of the bolster, each'friction member comprising a plate interposed'between the side of the bolster and the corresponding 'bols'ter uide; a fulcrum arm laterally projecting from the upper end of said plate at the inner side thereof, said arm being fulcrumed in the fulcrum pocke't'at the corresponding side of the bolster; a spring follower arm laterally projecting from the upper end of said plate at the outer side thereof, said arm' extending through the corresponding bolster guide; a spring abutment on said side frame below said spring follower arm; and a spring interposed between said spring follower arm and spring abutment, said spring bearing at opposite ends on said abutment and the outer end of said spring follower arm.

GEORGE E. DATH. 

